package cn.ltcast.directory;

import android.Manifest;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity  implements View.OnClickListener{
    MyHelper myHelper;
    private EditText mEtName;
    private EditText mEtPhone;
    private TextView mTvShow;
    private Button mBtnAdd;
    private Button mBtnQuery;
    private Button mBtnUpdate;
    private Button mBtnDelete;
    private Button mBtnBh;
    private final int REQUEST_CALL_PERMISSION = 10111; //拨号请求码


    @Override
    public void onClick(View v) {
        String name;
        String phone;
        SQLiteDatabase db;
        ContentValues values;
        switch (v.getId()){
            case R.id.btn_add:
                name=mEtName.getText().toString();
                phone=mEtPhone.getText().toString();
                db=myHelper.getWritableDatabase();
                values=new ContentValues();
                values.put("name",name);
                values.put("phone",phone);
                db.insert("information",null,values);
                Toast.makeText(this,"信息已添加",Toast.LENGTH_SHORT).show();
                db.close();
                break;
            case R.id.btn_query:
                db=myHelper.getReadableDatabase();
                Cursor cursor=db.query("information",null,null,null,null,null,null
                );
                if(cursor.getCount()==0){
                    mTvShow.setText("");
                    Toast.makeText(this,"没有数据",Toast.LENGTH_SHORT).show();
                }else {
                    cursor.moveToFirst();
                    mTvShow.setText("Name:"+cursor.getString(1)+";Tel:"+cursor.getString(2));
                }
                while (cursor.moveToNext()){
                    mTvShow.append("\n"+"Name:"+cursor.getString(1)+";Tel:"+cursor.getString(2));
                }
                cursor.close();
                db.close();
                break;
            case R.id.btn_updadte:
                db=myHelper.getWritableDatabase();
                values=new ContentValues();
                values.put("phone",phone=mEtPhone.getText().toString());
                db.update("information",values,"name=?",new String[]{mEtName.getText().toString()});
                Toast.makeText(this,"信息已修改",Toast.LENGTH_SHORT).show();
                db.close();
                break;
            case R.id.btn_delete:
                db=myHelper.getWritableDatabase();
                db.delete("information",null,null);
                Toast.makeText(this,"信息已删除",Toast.LENGTH_SHORT).show();
                mTvShow.setText("");
                db.close();
                break;
            case R.id.btn_bh:
                call();
        }
    }

    private void call(){
        String phone=mEtPhone.getText().toString();
        Intent intent =new Intent();
        intent.setAction(Intent.ACTION_CALL);
        Uri uri=Uri.parse("tel:"+phone);
        intent.setData(uri);
        if(checkReadPermission(Manifest.permission.CALL_PHONE,REQUEST_CALL_PERMISSION)){
            startActivity(intent);
        }
    }

    public boolean checkReadPermission(String string_permission,int request_code) {
        boolean flag = false;
        if (ContextCompat.checkSelfPermission(this, string_permission) == PackageManager.PERMISSION_GRANTED) {//已有权限
            flag = true;
        } else {//申请权限
            ActivityCompat.requestPermissions(this, new String[]{string_permission}, request_code);
        }
        return flag;
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case REQUEST_CALL_PERMISSION: //拨打电话
                if (permissions.length != 0 && grantResults[0] != PackageManager.PERMISSION_GRANTED) {//失败
                    Toast.makeText(this,"请允许拨号权限后再试",Toast.LENGTH_SHORT).show();
                } else {//成功
                    call();
                }
                break;
        }
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myHelper=new MyHelper(this);
        init();


    }
    private void init(){
        mEtName=(EditText) findViewById(R.id.et_name);
        mEtPhone=(EditText) findViewById(R.id.et_phone);
        mTvShow=(TextView) findViewById(R.id.tv_show);
        mBtnAdd=(Button) findViewById(R.id.btn_add);
        mBtnQuery=(Button) findViewById(R.id.btn_query);
        mBtnUpdate=(Button) findViewById(R.id.btn_updadte);
        mBtnDelete=(Button) findViewById(R.id.btn_delete);
        mBtnBh=(Button) findViewById(R.id.btn_bh);
        mBtnAdd.setOnClickListener(this);
        mBtnQuery.setOnClickListener(this);
        mBtnUpdate.setOnClickListener(this);
        mBtnDelete.setOnClickListener(this);
        mBtnBh.setOnClickListener(this);
    }
    class MyHelper extends SQLiteOpenHelper {
        public MyHelper(Context context){
            super(context,"itcast.db",null,1);
        }
        @Override
        public void onCreate(SQLiteDatabase db){
            db.execSQL("CREATE TABLE information(_id INTEGER PRIMARY KEY AUTOINCREMENT,name VARCHAR(20),phone VARCHAR(20))");
        }
        @Override
        public void onUpgrade(SQLiteDatabase db,int oldVersion, int newVersion){

        }
    }
}